Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 78, NWS Buffalo, NY

August 19, 2011Allegany County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 19, 2011, 12:10 PM EDT for Allegany County, New York. It was in force for 65 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 19, 2011, 12:10 PM EDT (16:10 UTC)
Expired: Aug 19, 2011, 1:15 PM EDT
In force: 65 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

County Allegany County, NY

The radar

The Buffalo radar (KBUF), 86 km from the middle of the area, began a volume at 16:09 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 4.2 hours before the alert went out and 82 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 551 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 1064 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 44 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

832 
WUUS51 KBUF 191610
SVRBUF
NYC003-191715-
/O.NEW.KBUF.SV.W.0078.110819T1610Z-110819T1715Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1210 PM EDT FRI AUG 19 2011

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL ALLEGANY COUNTY IN WESTERN NEW YORK

* UNTIL 115 PM EDT

* AT 1204 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 7 MILES
  EAST OF HOUGHTON...OR 17 MILES WEST OF ARKPORT...AND MOVING
  SOUTHEAST AT 15 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  FILLMORE...  

LAT...LON 4246 7821 4249 7794 4242 7772 4235 7773
      4233 7806
TIME...MOT...LOC 1609Z 302DEG 12KT 4242 7800

$$

ZAFF

2 follow-up statements

590 
WWUS51 KBUF 191639
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1239 PM EDT FRI AUG 19 2011

NYC003-191715-
/O.CON.KBUF.SV.W.0078.000000T0000Z-110819T1715Z/
ALLEGANY NY-
1239 PM EDT FRI AUG 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 PM EDT
FOR NORTH CENTRAL ALLEGANY COUNTY...

AT 1237 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS 
LOCATED BETWEEN CANEADEA AND BIRDSALL...MOVING SOUTHEAST AT 10 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  BIRDSALL...
  CANEADEA...

LAT...LON 4246 7821 4249 7794 4242 7772 4235 7773
      4233 7806
TIME...MOT...LOC 1638Z 309DEG 10KT 4237 7802

$$

ZAFF

424 
WWUS51 KBUF 191709
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
109 PM EDT FRI AUG 19 2011

NYC003-191718-
/O.EXP.KBUF.SV.W.0078.000000T0000Z-110819T1715Z/
ALLEGANY NY-
109 PM EDT FRI AUG 19 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL ALLEGANY COUNTY
WILL EXPIRE AT 115 PM EDT...

THE STORMS THAT PROMPTED THE WARNING HAVE MOVED SOUTH OF THE 
AFFECTED AREA. 

A FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHERN ALLEGANY COUNTY 
UNTIL 330 PM

LAT...LON 4246 7821 4249 7794 4242 7772 4235 7773
      4233 7806
TIME...MOT...LOC 1708Z 309DEG 10KT 4232 7793

$$

NIZIOL

The office that day

Everything else NWS Buffalo, NY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 19, 12:13 AM EDT	Special Weather Statement	BUF	Cattaraugus	62 min
Aug 19, 12:59 AM EDT	Special Weather Statement	BUF	Cattaraugus	61 min
Aug 19, 12:08 PM EDT	Areal Flood Advisory	BUF	Allegany	3 hr
Aug 19, 12:39 PM EDT	Flash Flood Warning	BUF	Allegany	110 min
Aug 19, 1:15 PM EDT	Severe Thunderstorm Warning	BUF	Wyoming	45 min
Aug 19, 2:20 PM EDT	Special Weather Statement	BUF	Livingston	55 min
Aug 19, 3:50 PM EDT	Special Weather Statement	BUF	Allegany	55 min
Aug 19, 3:51 PM EDT	Special Weather Statement	BUF	Allegany	54 min
Aug 19, 4:06 PM EDT	Areal Flood Advisory	BUF	Allegany	119 min
Aug 19, 5:55 PM EDT	Special Weather Statement	BUF	Ontario	65 min
Aug 19, 6:23 PM EDT	Areal Flood Advisory	BUF	Livingston, Ontario	97 min

Nearby

Severe Thunderstorm Warnings in New York, 2011 Every severe thunderstorm warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.